Sign stand



FIG. 1 is a perspective view showing the sign stand of our design with a representative sign shown in dotted lines, the sign forming no part of the design;

FIG. 2 is an enlarged front view thereof;

FIG. 3 is a left side view of the right side view being a mirror image thereof;

FIG. 4 is a top view; and,

FIG. 5 is a bottom view.

In the drawings, the broken lines represent environmental structure forming no part of the claimed design. 

I claim the ornamental design for a sign stand, as shown and described. 